8 _ 01/20/53 RESULT FLAG UNITS REFERENCE INTERVAL LLB diagnosis by another medically established diagnostic product or procedury Diphtheria Antitoxoid Ab 0.15 o Complement C4, Serum ESN Tryptase For research use only. 26 1.740 L/e/ 5.0  IU/mL <0.10 Interpretation: Non-Protective <0.10 Prot